A Socket set screws is also known as a Grub screw. It has no head, the length is measured overall and are fastened using a hexagonal wrench also known as an Allen key.
These Knurled Point type have a serrated, jagged edge at its tip. This is designed to bite into a surface and lock which prevents the screw from loosing due to movement or vibration.
Use Allen key size = 4mm
Metric Fine Thread
Thread pitch = 1.0mm
High Tensile Class 14.9
Plain Black Finish
